Can end with bonded seal slide

ABSTRACT

A can end is provided with a pour opening having a pour width. The pour opening is provided with an entry aperture at one end of the pour opening. The entry aperture has a slide width greater than the pour width. The can end has a can end lapping portion and a can end sealing portion adjacent the pour opening and a plane of bulge strength adjacent the entry aperture. A slide is adapted to pass through the entry aperture and has a slide lapping portion and a slide sealing portion. The slide lapping portion is adapted to register with the can end lapping portion, and the slide sealing portion is adapted to register with the plane of bulge strength. A pull tab has a connection to the slide. Engaging means engage the can end lapping portion to press the can end lapping portion into intimate contact with the slide lapping portion and the slide sealing portion into intimate contact with the plane of bulge strength. A pressure barrier material is employed for sealing the intimately contacting can end sealing portion and the slide lapping portion and also for sealing the intimately contacting plane of bulge strength and the slide sealing portion. The pressure barrier material is bonded to the can end sealing portion with the first predetermined shear strength and to the slide lapping portion and to the plane of bulge strength with a second predetermined shear strength less than the first predetermined shear strength. The pull tab is operable to move the slide lapping portion away from the can end lapping portion to break the bond between the slide lapping portion and the pressure barrier material adjacent the can end sealing portion so that the pressure barrier material adjacent the can end sealing portion now functions as an exit and reclosure slide guide. The pull tab is simultaneously operable to move the slide sealing portion away from such plane of bulge strength to break the bond between the pressure barrier material adjacent the plane of bulge strength and the slide sealing portion so that the pressure barrier material adjacent the plane of bulge strength acts as a guide to uncover the pour opening.

United States Patent Douty [54] CAN END WITH BONDED SEAL SLIDE [72] Inventor: Donald L. Douty, Franklin Township, Westmoreland County, Pa.

[73] Assignee: United States Steel Corporation [22] Filed: Jan. 28, 1972 [21] Appl. No.: 221,599

Related US. Application Data Division of Ser. No. 146,945, May 26, 1971, which is a division of Ser. No. 61,384, Aug. 5, 1970, Pat. No. 3,622,055. I

[52] US. Cl. ..222/484, 222/541, 220/41,

220/53 [51] Int. Cl. ..B65d 47/10 [58] Field of Search ..222/541, 559, 560, 561, 153,

Primary Examiner-Stanley H. Tollberg Attorney-Robert J. Leek, Jr.

[57] ABSTRACT A can end is provided with a pour opening having a pour width. The pour opening is provided with an entry aperture at one end of the pur opening. The entry aperture has a slide width greater than the pour .15. 3,703,979 [451 Nov. 28, 1972 width. The can end has a can end lapping portion and a can end sealing portion adjacent the pour opening and a plane of bulge strength adjacent the entry aperture. A slide is adapted to pass through the entry aperture and has a slide lapping portion and a slide sealing portion. The slide lapping portion is adapted to register with the can end lapping portion, and the slide sealing portion is adapted to register with the plane of bulge strength. A pull tab has a connection to the slide. Engaging means engage the can end lapping portion to press the can end lapping portion into intimate contact with the slide lapping portion and the slide sealing portion into intimate contact with the plane of bulge strength. A pressure barrier material is employed for sealing the intimately contacting can end sealing portion and the slide lapping portion and also for sealing the intimately contacting plane of bulge strength and the slide sealing portion. The pressure barrier material is bonded to the can end sealing portion with the first predetermined shear strength and to the slide lapping portion and to the plane of bulge strength with a second predetermined shear strength less than the first predetermined shear strength. The pull tab is operable to move the slide lapping portion away from the can end lapping portion to break the bond between the slide lapping portion and the pressure barrier material adjacent the can end sealing portion so that the pressure barrier material adjacent the can end sealing portion now functions as an exit and reclosure slide guide. The pull tab is simultaneously operable to move the slide sealing portion away from such plane of bulge strength to break the bond between the pressure barrier material adjacent the plane of bulge strength and the slide sealing portion so that the pressure barrier material adjacent the plane of bulge strength acts as a guide to uncover the pour opening.

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FIG. 8E

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PATENTEDuuvza I972 SHEET l'lUF 34 PATENTEDnnv 28 I972 3. .703. 9 7 9 SHEET 18 0F 34 PATENTED NOV 28 1972 sum 19 or 3 

1. In combination: a. a can end provided with a pour opening having a pour width,
 1. said pour opening being provided with an entry aperture at one end of said pour opening, said entry aperture having a slide width greater than said pour width,
 2. said can end having a can end lapping portion and a can end sealing portion adjacent said pour opening and a plane of bulge strength adjacent said entry aperture, b. a slide adapted to pass through said entry aperture and having a slide lapping portion and a slide sealing portion,
 1. said slide lapping portion being adapted to register with said can end lapping portion, and
 2. said slide sealing portion being adapted to register with said plane of bulge strength, c. a pull tab having a connection to said slide, d. engaging means engaging said can end lapping portion to press said can end lapping portion into intimate contact with said slide lapping portion and said slide sealing portion into intimate contact with said plane of bulge strength, e. a pressure barrier material for sealing said intimately contacting can end sealing portion and said slide lapping portion and also for sealing said intimately contacting plane of bulge strength and said slide sealing portion,
 1. said pressure barrier material being bonded to said can end sealing portion with a first predetermined shear strength and to said slide lapping portion and to said plane of bulge strength with a second predetermined shear strength less than said first predetermined shear strength, f. said pull tab being operable to move said slide lapping portion away from said can end lapping portion to break the bond between said slide lapping portion and said pressure barrier material adjacent said can end sealing portion so that said pressure barrier material adjacent said can end sealing portion now functions as an exit and reclosure slide guide, and g. said pull tab being simultaneously operable to move said slide sealing portion away from said plane of bulge strength to break the bond between said pressure barrier material adjacent said plane of bulge strength and said slide sealing portion so that said pressure barrier material adjacent said plane of bulge strength acts as a guide to uncover said pour opening.
 2. said can end having a can end lapping portion and a can end sealing portion adjacent said pour opening and a plane of bulge strength adjacent said entry aperture, b. a slide adapted to pass through said entry aperture and having a slide lapping portion and a slide sealing portion,
 2. said slide sealing portion being adapted to register with said plane of bulge strength, c. a pull tab having a connection to said slide, d. engaging means engaging said can end lapping portion to press said can end lapping portion into intimate contact with said slide lapping portion and said slide sealing portion into intimate contact with said plane of bulge strength, e. a pressure barrier material for sealing said intimately contacting can end sealing portion and said slide lapping portion and also for sealing said intimately contacting plane of bulge strength and said slide sealing portion,
 2. The combination recited in claim 1 wherein said entry aperture is a slit.
 3. The combination recited in claim 1 wherein said entry aperture is a slot.
 4. the combination recited in claim 1 wherein said entry aperture is provided with a slide guide means.
 5. The combination recited in claim 1 wherein said slide has a bulge strength measured in lbs./sq. inch equal to or greater than the bulge strength of said can end.
 6. The combination recited in claim 1 wherein said engaging means has a stationary member supporting one member of said pull tab, said slide and said can end and a movable member engaging another member of said pull tab, said slide and said can end.
 7. The combination recited in claim 1 wherein said engaging means is said pull tab engaging said can end lapping portion.
 8. The combination recited in claim 1 wherein said pull tab is integral with said slide.
 9. The combination recited in claim 1 wherein said connection is integral with one of said pull tab and said slide.
 10. The combination recited in claim 1 wherein said connection is separate from either said pull tab or said slide.
 11. The combination recited in claim 1 wherein said connection is a weld.
 12. The combination recited in claim 1 wherein said connection is an adhesive.
 13. The combination recited in claim 1 wherein said connection is sealed to said slide by said pressure barrier material.
 14. The combination recited in claim 1 wherein said pour opening is radial.
 15. The combination recited in claim 1 wherein said pour opening is chordal.
 16. The combination recited in claim 1 wherein said can end has a pour opening embossment around said pour opening.
 17. The combination recited in claim 16 wherein said embossment is upward.
 18. The combination recited in claim 16 wherein said embossment is downward for vacuum sealing.
 19. The combination recited in claim 1 wherein said slide has a locking tab for engaging said can end.
 20. The combination recited in claim 1 wherein said locking tab has a locking tab plane of weakness.
 21. The combination recited in claim 1 wherein said pour opening has substantially straight sides.
 22. The combination recited in claim 1 wherein said pour opening has arcuate sides.
 23. The combination recited in claim 1 wherein said pull tab is of the corrugated type.
 24. The combination recited in claim 1 wherein said pull tab is of the ring type.
 25. The combination recited in claim 1 wherein said pull tab is of the serrated type.
 26. The combination recited in claim 1 wherein said pull tab is of the projecting type.
 27. The combination recited in claim 1 wherein said pull tab is of the waffle type.
 28. The combination recited in claim 1 wherein said pull tab has a plurality of protuberances.
 29. The combination recited in claim 1 wherein said pull tab has a plurality of cavities.
 30. The combination recited in claim 1 wherein said can end is provided with a vent aperture and one vent closure portion of said slide or said pull tab is adapted to cover said vent aperture, said pressure barrier material being adapted to seal said vent aperture to said one vent closure portion, said one vent closure portion being operable to break said seal between said vent aperture and said one vent closure portion when said slide moves out of said entry aperture.
 31. The combination recited in claim 30 wherein said vent aperture is provided with a vent entry aperture.
 32. The combination recited in claim 31 wherein said vent entry aperture is a slot.
 33. The combination recited in claim 32 wherein said vent entry aperture is a slit.
 34. The combination recited in claim 31 wherein said vent entry aperture is provided with a vent closure portion guide means.
 35. The combination recited in claim 31 and having stop means on either said vent closure portion or said can end for preventing said vent closure portion from leaving said vent entry aperture.
 36. The combination recited in claim 30 wherein said one vent closure portion has a bulge strength measured in lbs./sq. inch equal to or greater than the bulge strength of said can end.
 37. The combination recited in claim 30 wherein said vent aperture is radial.
 38. The combination recited in claim 30 wherein said vent aperture is chordal.
 39. The combination recited in claim 30 wherein said can end has a vent aperture embossment around said vent aperture.
 40. The combination recited in claim 39 wherein said vent aperture embossment is upward.
 41. The combination recited in claim 39 wherein said vent aperture embossment is downward for vacuum seal.
 42. The combination recited in claim 30 wherein said one vent closure portion has a locking tab for engaging said can end.
 43. The combination recited in claim 30 wherein said vent aperture has substantially straight sides.
 44. The combination recited in claim 30 wherein said vent aperture has arcuate sides.
 45. The combination recited in claim 1 wherein said pull tab is of the expansion type. 